Fluval Power Spectrum T5HO Fluorescent Bulb, 24W, 22 inch High intensity, high temperature light Ideal for freshwater, saltwater and planted aquariums, coral and invertebrates Longer life versus other comparable high output fluorescents Super bright lighting, strong blue spectral range, stimulates photosynthetic corals, invertebrates and other marine life Ideal for marine and African cichlid aquariums